EP3016754A1 - Anlage und verfahren zum warmwalzen von stahlband - Google Patents
Anlage und verfahren zum warmwalzen von stahlbandInfo
- Publication number
- EP3016754A1 EP3016754A1 EP14736716.3A EP14736716A EP3016754A1 EP 3016754 A1 EP3016754 A1 EP 3016754A1 EP 14736716 A EP14736716 A EP 14736716A EP 3016754 A1 EP3016754 A1 EP 3016754A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- rolling
- steel strip
- hot
- stand
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 115
- 239000010959 steel Substances 0.000 title claims abstract description 115
- 238000005098 hot rolling Methods 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 151
- 238000005096 rolling process Methods 0.000 claims abstract description 117
- 239000012809 cooling fluid Substances 0.000 claims description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 229910052796 boron Inorganic materials 0.000 claims description 3
- 229910052791 calcium Inorganic materials 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229910052717 sulfur Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims 3
- 239000007788 liquid Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 10
- 238000001953 recrystallisation Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000007704 transition Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 101000674742 Homo sapiens Transcription initiation factor TFIID subunit 5 Proteins 0.000 description 2
- 102100021230 Transcription initiation factor TFIID subunit 5 Human genes 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JNUZADQZHYFJGW-JOCHJYFZSA-N (2R)-N-[3-[5-fluoro-2-(2-fluoro-3-methylsulfonylanilino)pyrimidin-4-yl]-1H-indol-7-yl]-3-methoxy-2-(4-methylpiperazin-1-yl)propanamide Chemical compound FC=1C(=NC(=NC=1)NC1=C(C(=CC=C1)S(=O)(=O)C)F)C1=CNC2=C(C=CC=C12)NC([C@@H](COC)N1CCN(CC1)C)=O JNUZADQZHYFJGW-JOCHJYFZSA-N 0.000 description 1
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 101000674710 Homo sapiens Transcription initiation factor TFIID subunit 6 Proteins 0.000 description 1
- 102100021170 Transcription initiation factor TFIID subunit 6 Human genes 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000001816 polyoxyethylene sorbitan tristearate Substances 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0203—Cooling
- B21B45/0209—Cooling devices, e.g. using gaseous coolants
- B21B45/0215—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes
- B21B45/0218—Cooling devices, e.g. using gaseous coolants using liquid coolants, e.g. for sections, for tubes for strips, sheets, or plates
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0226—Hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
- C21D8/0263—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/573—Continuous furnaces for strip or wire with cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
- F27D15/0206—Cooling with means to convey the charge
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
- B21B1/26—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by hot-rolling, e.g. Steckel hot mill
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0221—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the working steps
- C21D8/0231—Warm rolling
Definitions
- the invention relates to a plant and a method for hot rolling steel strip.
- a hot rolling mill of the type in question usually comprises a hot rolling mill with several in
- Hot strip mill It is therefore desirable to hot roll even thick steel strips in a conventional hot rolling mill.
- a test specimen of defined weight is dropped from a similarly defined height on a strip-shaped sheet sample, which provided on its side facing away from the impacting test specimen in the region of the expected fracture with a defined groove-like notch and placed with their end portions on a respective support is. It is usually required that at a certain predetermined temperature, for example -35 ° C, the ductile fracture fraction is on average 85% in the fraction of the sample thus produced.
- the starting material is in the first mill stand of Finishing scale initiated at a temperature which is at least 30 ° C above the recrystallization stop temperature of the respective steel. Then, a continuous hot rolling of the Vorbands to a hot strip in one or more stitches. The hot rolling is carried out in a temperature range, the
- Recrystallization range of austenite includes. Between two rolling stands thereupon a cooling of the
- Cooling rate of the cooling is at least 10 ° C / s. Then the rolling below the
- steels for the manufacture of thick-walled tubes are typically made of an alloy in which, in addition to iron and unavoidable impurities (in% by weight), C: 0,1 0.18%, Si: 1.5 %, Mn: ⁇ 2.5%, P: 0, 005 - 0.1%, S: ⁇ 0.03%, N: ⁇ 0.02%, Cr: ⁇ 0.5%, Cu: ⁇ 0, 5%, Ni: ⁇ 0.5%, Mo: ⁇ 0.5%, Al ⁇ 2%, to a total of 0.3% of one or more of the elements B, Nb, Ti, V, Zr and Ca are present.
- These steels include those known as "X70" and X80
- the object of the invention was to create a plant and a process for hot rolling on the basis of a conventional hot rolling plant, with which reliable hot strips with a final thickness of more than 15 mm can be produced, which are also the highest
- the plant according to the invention for hot rolling of steel strip accordingly comprises, in accordance with the prior art given at the outset, a hot rolling stand which has a plurality of rolling stands, which are successively passed in the conveying direction of the hot-rolled steel strip.
- such a hot rolling stand comprises five to seven rolling mills, which are lined up in the conveying direction one behind the other and from each
- the conveying direction of the hot-rolled steel strip is not only seen behind the last mill stand
- Hot-rolling line The beginning of the cooling section is set up so that the cooling section in immediate
- Cooling section actively passed rolling mill begins. "Active” here means that in this rolling mill another
- the hot strip is detected when leaving the last in the conveying direction before the start of the cooling section last hot rolling mill, in which still takes place a hot rolling, directly from the cooling section discharged cooling fluid and
- Hot rolling team such that the rolling relay at least a rolling mill can be shortened and the cooling section is extended at least as far in the rolling scale that the inactivation of one or more of the last in the conveying direction of the hot rolled steel strip rolling mill cooling can be done directly behind the last rolling mill, in the still one
- Forming takes place.
- Rolled steel strip accordingly provides that it is carried out on a plant designed according to the invention and thereby during in-hot rolling at inactive
- the invention is thus based on the proposal to operate a conventional multi-stand rolling train so that the thickness of the steel strip is not reduced in each of him passed through hot rolling stands. Instead, the steel strip is deformed only in the active rolling stands of the rolling scale. In the inactive rolling stands, the nip is opened so far that his work rolls no longer touch the rolling stock, so no in him
- Forming can take place more.
- the beginning of the cooling section is shifted into the hot rolling scale, so that, for example, at a
- This approach is based on the finding that when high-strength tube sheet grades with a thickness of more than 15 mm, the toughest demands on their toughness, are to be hot rolled in a hot rolling mill in which they are the rolling stands in one
- Transition temperature of - 10 ° C and less and up to thicknesses of 25.4 mm have high toughness requirements.
- bainitic steels can preferably be used in order to reliably achieve the requirements to be met according to DWTT.
- ferritic / pearlitic steels Forming onset cooling, the application of ferritic / pearlitic steels can be extended to larger thicknesses.
- the cooling of the rolls in thicknesses> 15 mm which reaches into the rolling scale according to the invention until the rolling scale, provides unhindered access of oxygen and, consequently, a strong after-scaling of the strip surfaces
- the rolling speeds are low due to the early end of the active forming and the low overall forming ratios achieved during hot rolling. Typically, they are in the range of less than 3 m / s.
- the system configuration only has to be designed so that z. B. when rolling in a rolling scale with seven rolling stands, of which, however, only the first five are activated, the injection begins directly behind the fifth frame, optimally deployed respectively before or behind the unused rolling stands
- Cooling fluid quantity is adjustable.
- measuring house different holding times can be realized at desired cooling curves.
- the cooling section may comprise a plurality of cooling units and above that in the conveying direction behind the last before entering the cooling section
- Cooling rates of at least 130 K / s have proven to be particularly useful, in practice the
- Cooling rate is typically up to 160 K / s.
- the grain growth in the respectively hot-rolled steel strip is limited and the cold toughness of the material is increased so that it achieves maximum toughness values at low temperatures
- cooling section is able to afford a cooling fluid output of at least 1000 m 3 / h, in particular up to 1500 m 3 / h. It will preferably both the top and the
- Intense cooling can remain on the hot strip
- Intensive cooling units may be formed.
- Cooling units are limited from each other, resulting in practice best work results.
- Hot rolling mills are used to cool each hot rollable strip between two stands.
- used cooling units cause according to the invention such an intensive belt cooling that no controlled deformation can be done more in Austenit.
- the exit temperature with which the steel strip enters the cooling section when it leaves the last rolling mill via which it is thermoformed is typically between 740 ° C. and 900 ° C.
- Cooling stop temperature has reached. It has also proven to be advantageous in terms of the expression of the desired mechanical properties when the steel strip is cooled after reaching this cooling stop temperature for 2 - 12 seconds without active cooling in air.
- the steel strip can be reeled at a reel temperature which is between 450 ° C and 650 ° C.
- the hot rolling according to the invention are in particular thin slab or pre-strip with a thickness of 50 - 100 mm, in question.
- the hot rolling according to the invention are in particular thin slab or pre-strip with a thickness of 50 - 100 mm, in question.
- Final thickness of the present invention hot rolled steel strip typically more than 15 mm.
- Hot rolling which are up to 25.4 mm thick, and which also meet the highest demands on toughness in the DWTT.
- the inventive method is suitable for higher strength, micro-alloyed steels, and steels according to DIN EN 10149.
- the process according to the invention is particularly suitable for processing steel strips from the bainitic grades X60, X65, X70, X80 and other comparable steels which Usually used for heavy plate production.
- the particularly suitable for the process according to the invention steels can be classified under the general
- Cooling section and hot roll stand deactivated or operated so that they meet the requirements placed on the cooling during conventional hot rolling.
- the invention is based on
- FIG. 1 shows a plant 1 for hot rolling of steel strip S with a final thickness D of more than 15 mm with cooling from above and below;
- Figure 2 shows two provided in Appendix 1 rolling stands in a side view.
- FIG. 3 the two stands according to FIG. 2 in a
- FIG. 4 shows a diagram in which the temperature profile over time is shown for various variants of a cooling of the steel strip carried out in the plant 1.
- the plant 1 comprises a hot rolling stand 2, which is formed in a conventional manner by seven rolling stands Fl, F2, F3, F4, F5, F6, F7, which are set up successively in the conveying direction F of the hot rolled steel strip S in Appendix 1, a roller table 3, which follows the hot rolling stand 2 in the conveying direction F, a reeling device 4, which is positioned at the end of the roller table 3, viewed in the conveying direction F.
- a measuring house M which is arranged adjacent to the end of the hot rolling stand 2 in the area of the roller table 3, and a cooling section 5.
- the cooling section 5 is lined up by several in the conveying direction F consecutively, as compact refrigerators
- cooling units K4, K5, K6, Kn formed which are fed via a cooling fluid supply, not shown here, and theirméfluidausbringung can be set individually.
- the cooling fluid is thereby applied by the respective cooling units Kl - Kn respectively from below and from above onto the respective associated lower and upper sides of the steel strip S.
- the cooling fluid flowing to the cooling units K1-K3 may, if necessary, be pressurized by means of pumps which are likewise not shown here.
- Cooling section 5 is arranged between the fifth rolling stand F5 and the sixth rolling stand F6 and the second cooling unit K2 of the cooling section 5 between the sixth rolling stand F6 and the seventh rolling stand F7 of the rolling squadron 2, so that the cooling section 5 extends into the rolling squadron 2 and, accordingly, the End section 6 of
- the length section a, over which the cooling units K 1, K 2 and K 3 respectively arranged in the rolling scale, apply cooling fluid to the steel strip S, is limited to approximately 10% of the distance A, in which, as in the conveying direction F, one behind the other
- a respective spraying device Q1, Q2, Q3 is provided, which has a transverse direction to the conveying direction F and aligned in the direction of the respective cooling unit K1, K2, K3
- High pressure jet 0 at least on the top of the
- Steel bands S directed to drive there standing cooling fluid from the surface in question.
- the practice shows that in each case at least five of the rolling stands Fl - F7 must be active, according to the invention in each case after the last in the conveying direction F active rolling mill, but at the latest after the last
- Refrigeration unit Kl is set up so that, if that
- Cooling unit Kl is turned on by him
- Coolant jets if the cooling unit K2 is turned on, reach the exit from the roll stand F6. Likewise arranged in the conveying direction F behind the seventh rolling stand F7 cooling unit K3 is set up so that, if the cooling unit K3
- Coolant jets extend to the mill stand F7.
- At least one of the cooling units K1 - K3 is in each case in operation. In the area of each non-active cooling unit can take place cooling in air.
- Hot roll stand 2 standing cooling units K4 - Kn the hot strip is cooled to the respective required reel temperature HT.
- Steel slabs are typically in the range of 180-270 mm in practice. Specifically, 255 mm thick slabs have been produced in the embodiments described here from the specified in Table 1 steels El, E2, E3, with a lying typically in the range of 800 - 1050 ° C hot rolling start temperature WAT in the
- Hot roll relay 2 arrived and there in one
- Rolling mills Fl, F2, F3, F4, F5 were each hot-rolled to form a steel strip S.
- the thickness D of the steel strips S hot-rolled from the steels E1, E2, E3 was in each case 23 mm or 18 mm. The explained in the here
- Rolling mills F6 and F7 of the rolling scale 2 no deformation of the steel strip S more instead.
- the steel strip S emerging from the working gap A5 is detected by the cooling fluid jet of the cooling unit K1 and intensively cooled on its way to the next rolling stand F6 until it has reached the entrance E6 of the rolling stand F6.
- the steel strip S has passed through the working gap A6 of the inactive rolling stand F6, it is directly in the same way from the cooling fluid jet of the
- Cooling unit K2 recorded and also intensively cooled until it has reached the entrance E7 of the inactive rolling stand F7. Just as immediately when it has passed through the working gap A7 of the rolling stand F7, the steel strip S is the cooling fluid jet of
- Cooling unit K3 has been detected and leaked to the roller table 3, on which it has been further accelerated and controlled cooled by the there arranged further cooling units K4 - Kn, to a
- Cooling stop temperature of 500 - 700 ° C has been achieved. Upon reaching the cooling stop temperature is the active
- the cooling units Kl - Kn the cooling section 5 have at a cooling fluid pressure of more than 3 bar, specifically 3.2 bar, and a cooling fluid temperature of less than 40 ° C, specifically 25 ° C, via the cooling section 5 a
- water has been used as the cooling fluid.
- other cooling fluids can be used to achieve the required cooling rate.
- Roll stand F5 is cooled down to the measuring house M in the air and after the measuring house M by means of conventional laminar cooling.
- Rolling stand F5 has, by filled triangles, the respective temperature TAF6, which has the hot strip at the output of the first inactive rolling stand F6, by unfilled triangles, the respective temperature WET, which had the respective steel strip S at the end of the rolling scale 2, by a square and the respective reel temperature symbolized by a circle.
- Each of the steel strips S produced in this way from the steels El, E2 and E3 achieved the desired values for the respective steel in terms of strength (steel El: Rm at least 570 MPa, Rt0.5 at least 485 MPa, steel E2: Rm at least 570 MPa, Rt0.5 at least 485 MPa, steel E3: Rm at least 625 MPa, Rt0.5 at least 555 MPa).
- CAq C + Mn / 6 + (Ni + Cu) / 15 + (Cr + Mo + V) / 5 (according to International Institute of Welding (I.I.W.))
- PCM C + Si / 30 + (Mn + Cu + Cr) / 20 + Ni / 60 + Mo / 15 + V / 10 + 5B (according to ITO et al .: Weldability Formula of High Steels, Related to Heat-Affected Zone Cracking, Sumintomo Search, 1 (1969), H.5, p.59-70)
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Metal Rolling (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14736716T PL3016754T3 (pl) | 2013-07-03 | 2014-07-01 | Urządzenie i sposób walcowania na gorąco taśmy stalowej |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013107010.8A DE102013107010A1 (de) | 2013-07-03 | 2013-07-03 | Anlage und Verfahren zum Warmwalzen von Stahlband |
PCT/EP2014/063955 WO2015000895A1 (de) | 2013-07-03 | 2014-07-01 | Anlage und verfahren zum warmwalzen von stahlband |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3016754A1 true EP3016754A1 (de) | 2016-05-11 |
EP3016754B1 EP3016754B1 (de) | 2019-09-04 |
EP3016754B2 EP3016754B2 (de) | 2024-06-05 |
Family
ID=51162752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14736716.3A Active EP3016754B2 (de) | 2013-07-03 | 2014-07-01 | Verfahren zum warmwalzen von stahlband |
Country Status (11)
Country | Link |
---|---|
US (1) | US10335840B2 (de) |
EP (1) | EP3016754B2 (de) |
JP (1) | JP6450379B2 (de) |
KR (1) | KR102212807B1 (de) |
CN (1) | CN105392574B (de) |
CA (1) | CA2914540C (de) |
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WO2017169939A1 (ja) * | 2016-03-31 | 2017-10-05 | Jfeスチール株式会社 | 薄鋼板およびめっき鋼板、並びに、熱延鋼板の製造方法、冷延フルハード鋼板の製造方法、熱処理板の製造方法、薄鋼板の製造方法およびめっき鋼板の製造方法 |
JP6760407B2 (ja) * | 2017-02-16 | 2020-09-23 | 日本製鉄株式会社 | 熱間圧延鋼板及びその製造方法 |
DE102019220033A1 (de) | 2019-03-18 | 2020-09-24 | Sms Group Gmbh | Anlage und Verfahren zur Herstellung von metallischem Warmband |
CN113042539B (zh) * | 2021-03-25 | 2022-10-14 | 德龙钢铁有限公司 | 一种用于热轧带钢微观组织精细控制的冷却方法 |
EP4101552A1 (de) | 2021-06-09 | 2022-12-14 | Primetals Technologies Austria GmbH | Verfahren zur herstellung eines mikrolegierten stahls, ein mit dem verfahren hergestellter mikrolegierter stahl und giess-walz-verbundanlage |
AT525283B1 (de) * | 2021-10-29 | 2023-02-15 | Primetals Technologies Austria GmbH | Verfahren zur Herstellung eines Dualphasenstahlbands in einer Gieß-Walz-Verbundanlage, ein mit dem Verfahren hergestelltes Dualphasenstahlband und eine Gieß-Walz-Verbundanlage |
DE102022124366A1 (de) | 2022-09-22 | 2024-03-28 | Thyssenkrupp Steel Europe Ag | Verfahren zur Herstellung eines warmgewalzten Stahlflachprodukts zum Einsatz in der Rohrfertigung |
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2014
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- 2014-07-01 CA CA2914540A patent/CA2914540C/en not_active Expired - Fee Related
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- 2014-07-01 CN CN201480038407.1A patent/CN105392574B/zh not_active Expired - Fee Related
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CA2914540A1 (en) | 2015-01-08 |
EP3016754B2 (de) | 2024-06-05 |
KR102212807B1 (ko) | 2021-02-05 |
EP3016754B1 (de) | 2019-09-04 |
CN105392574B (zh) | 2019-01-18 |
PL3016754T3 (pl) | 2020-02-28 |
ES2756453T3 (es) | 2020-04-27 |
JP6450379B2 (ja) | 2019-01-09 |
US10335840B2 (en) | 2019-07-02 |
CA2914540C (en) | 2018-01-16 |
JP2016530099A (ja) | 2016-09-29 |
WO2015000895A1 (de) | 2015-01-08 |
CN105392574A (zh) | 2016-03-09 |
DE102013107010A1 (de) | 2015-01-22 |
KR20160030218A (ko) | 2016-03-16 |
MX364428B (es) | 2019-04-25 |
US20160151814A1 (en) | 2016-06-02 |
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